Ozow payment not reflecting

I used Ozow to.make payment to my RVS makro account..then i still get emails,sms's that i didnt make payment dor september,i need to pay urgently even got an email from attorneys that i meed to make payment to my account, i called RCS they have me an email adress to sent proof that i did pay..i then sent my bank statement to show that payment was done on the 28th of September, they then sent me an email asking what is target details, i asked what they meant,they requested proof of payment. I sent the bank statement and explained i cant generate a Proof of payment as this transaction was made via Ozow ,which is the link they sent me monthly to make payment,which then shows as if it is an online transaction..to this day i am going back and forth with Rcs collections, because they want proof of payment..